My sister in law is a Indian Citizen and Singapore PR . M ywife is US citizen and I am on AOS status.My wife wants her sister to come once she delivers sometime in October. The Singapore embassy wants a letter of invitation for her. Can someone provide sugestions as to how to write this letter and should we mention that she will have a delivery in October. We only want her to come for one month as we believe we can make some arrangements here and also she can only come here for one month. We were married here and she could not come at that time so can it be somehow used for inviting here to meet us and spend some time with us. If we do not mention pregnancy of my wife would it be misrepresentation. Can she just say that she wants to meet us as she has never met me and has not met her sister in more than a year. Her husband and kids will be in Singapore so immigrant intent should not be a problem. Any suggestions.